It is an herb that has the effect of clearing away heat and detoxifying the toxins, and is effective in relieving the symptoms of sore throat and headache caused by external wind-heat, and may also have certain antibacterial activity and anti-influenza virus. The common cold is mostly caused by viral infections such as respiratory syncytial virus, adenovirus, rhinovirus, coxsackievirus, etc. The clinical symptoms include fever, sore throat, nasal congestion, runny nose, cough and other symptoms. The common cold is self-limiting, which means that most of them can be cured naturally without medication. Therefore, although Banlangen can relieve the symptoms of sore throat and headache to a certain extent, it does not have the effect of anti common virus, so Banlangen does not cure the cold.